Fluke 8508A Service Manual page 26

8508A
Service Manual
Range
2
20
200
2 k
20 k
200 k
2 M
20 M
200 M
2 G
Range
2
20
200
2 k
20 k
200 k
2 M
20 M
200 M
2 G
[9]
Range
20 M
200 M
2 G
20 G
Type........................................................................ True 4-wire with Ohms guard. 2-wire selectable.
Max Lead Resistance............................................ 10
Full Scale Measurement Voltage
Normal Mode .......................................................... 200 mV/2 V/20 V
Lo Current Mode ..................................................... 200 mV/2 V
High Voltage Mode ................................................. 200 V
Protection (All ranges) .......................................... 250 V rms, 360 V pk
Ratio Accuracy
Range to Range...................................................... ±(Net Front Input Accuracy + Net Rear Input Accuracy)
Within Range .......................................................... Apply 24 hour or 20 minute Transfer Uncertainty specifications
Settling Time ......................................................... Up to 200 k range generally the same as DC Voltage Filter In but
1-16
Resistance - Normal Mode (Secondary Specifications)
Transfer Uncertainty
Measurement Current
100 mA
10 mA
10 mA
1 mA
100 A
100 A
10 A
1 A
100 nA
10 nA
Resistance - Lo Current Mode (Secondary Specifications)
Transfer Uncertainty
Measurement Current
100 mA
10 mA
1 mA
100 A
10 A
10 A
1 A
100 nA
10 nA
10 nA
Resistance - High Voltage Mode (Secondary Specifications)
Transfer Uncertainty
Measurement Current
10 A
1 A
100 nA
10 nA
depends on external connections
20 mins ±1 °C
15 °C - 30 °C
± (ppm Reading
+ ppm Range)
2.0 + 2.0
0.8 + 0.7
0.2 + 0.15
0.2 + 0.15
0.2 + 0.15
0.2 + 0.15
0.5 + 0.5
2.5 + 5
15 + 50
200 + 500
20 mins ±1 °C
15 °C - 30 °C
± (ppm Reading
+ ppm Range)
2.0 + 2.0
0.8 + 0.7
0.8 + 0.7
0.8 + 0.7
0.8 + 0.7
0.5 + 0.5
2.0 + 0.5
15 + 5
200 + 500
200 + 500
20 mins ±1 °C
15 °C - 30 °C
± (ppm Reading
+ ppm Range)
0.5 + 0.5
2.0 + 0.5
15 + 50
200 + 500
in any or all leads, 1 on 2
[1] [2] [3] [10]
Temperature Coefficient
5 °C - 15 °C
30 °C - 40 °C
± ppm Reading/°C
1.5 2.5
0.6 1.0
0.5 0.8
0.5 0.8
0.5 0.8
0.5 0.8
0.6 1.0
2 3
20 30
200 300
[1] [2] [3] [10]
Temperature Coefficient
5 °C - 15 °C
30 °C - 40 °C
± ppm Reading/°C
1.5 2.5
0.6 1.0
0.6 1.0
0.6 1.0
0.6 1.0
0.6 1.0
2 3
20 30
200 300
200 300
[1] [2] [3]
Temperature Coefficient
5 °C - 15 °C
30 °C - 40 °C
± ppm Reading/°C
0.6 1.0
2.0 3
20 30
200 300
range